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Comparison of Both Metabolic and Functional Effects Induced by Two Neuromuscular Electrical Stimulation Protocols: A Comprehensive Approach Using Magnetic Resonance Imaging and Spectroscopy

NCT02001675 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 60

Last updated 2013-12-05

No results posted yet for this study

Summary

Neuromuscular electrical stimulation (NMES) has emerged as a suitable tool for restoring, maintaining and/or enhancing muscular performance. From a practical point of view, NMES can elicit contractions either by direct activation of motor axons (i.e. peripheral mechanism) or by the recruitment of motoneurons in the spinal cord through the depolarization of sensory axons (central mechanism). It is noteworthy that NMES parameters widely affect the balance between transmission along these two pathways. Conventional NMES is usually delivered using short pulse duration (0.05-0.4 ms), low stimulation frequency (15-40 Hz) and high stimulus intensities so that the large antidromic volley in motor axons ensures that the evoked contraction will be driven largely by the direct depolarization of motor axons beneath the stimulation site with no or little involvement of central nervous system. On the contrary, when NMES is delivered using wide pulse widths (1 ms) and high frequency (up to 100 Hz) (WP-HF NMES), a portion of the evoked contraction arises from a central mechanism and the corresponding force (recently referred to as "extra force") is significantly (three times) larger than the conventional NMES-induced force. This extra force is supposed to represent the central contribution from the recruitment of spinal motoneurons by the evoked afferent volley given that no additional force was observed during a complete anesthetic block of the nerve proximal to the stimulation site. Despite the obvious differences in terms of activation of the neuromuscular system between conventional and WP-HF NMES, the functional, metabolic and cortical responses associated to both protocols remain to be determined

Conditions

  • Healthy

Interventions

DEVICE

magnetic resonance imaging (MRI)

DEVICE

31-phosphorous magnetic resonance spectroscopy (MRS-P31)

Sponsors & Collaborators

  • Assistance Publique Hopitaux De Marseille

    lead OTHER

Principal Investigators

  • michele DAMON · Assistance Publique Hopitaux De Marseille

Study Design

Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
45 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2012-12-31
Primary Completion
2015-12-31
Completion
2016-06-30

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02001675 on ClinicalTrials.gov